I would leave it to the experts on this to answer you... but I'm going to pitch in!
If you don't want to re-color it, just "tweak it" some, get John Frieda's Hair Glaze!!
(obviously not the clear one) they come in a choice of colors for brunette, blonde, or red, as well. This won't change the color of your hair, it will bind to it, smooth it out, gloss over any patchy or un-balanced areas, evening it out, and it smells, feels and looks great afterwards!
If you go to the "Hair Care" section of this forum, there is a post about the hair glazes if you want more information. Or you can just google it.
If you just had your coloring done, no, I don't think it's best to re-color on top of it so soon to fix anything, it's very damaging to your hair, but have you tried revisiting your colourist, and explaining why you are unhappy?
Best o' luck, OP!